Mohs scale

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Related to Mohs hardness scale: Rock cycle

Mohs scale

(mōz),
One of two scales measuring the hardness of materials. The original Mohs scale listed 10 sustances of increasing hardness: talc (1), gypsum (2), calcite (3), fluorite (4), apatite (5), orthoclase (6), quartz (7), topaz (8), corundum (9), and diamond (10); the modified Mohs scale lists 15 minerals and is known more commonly as the hardness scale. See: hardness scale.

Mohs scale

A system that qualifies minerals according to hardness, ranging from talc (1) to diamond (15).

Mohs,

Friedrich, German mineralogist, 1773-1839.
Mohs hardness number - a number on a mineralogic scale.
Mohs scale - a qualitative scale in which minerals are classified in order of their increasing hardness. Synonym(s): hardness scale
References in periodicals archive ?
** Teachers: Students can refer to the Mohs hardness scale in the activity on T3, in the Teacher's Edition.
2) The Mohs hardness scale goes from 1, for the softest minerals, to 10, for the hardest.
Which mineral ranks 4 on the Mohs hardness scale? --
A rock with a rank of 9 on the Mohs hardness scale is --.